Global Patent Index - EP 1079394 A4

EP 1079394 A4 20010711 - SEMICONDUCTOR MEMORY

Title (en)

SEMICONDUCTOR MEMORY

Title (de)

HALBLEITERSPEICHER

Title (fr)

MEMOIRE DE SEMI-CONDUCTEUR

Publication

EP 1079394 A4 20010711 (EN)

Application

EP 99913705 A 19990419

Priority

  • JP 9902061 W 19990419
  • JP 12428898 A 19980417

Abstract (en)

[origin: WO9954882A1] A semiconductor circuit of large-scale integration for storing analog data and multivalued data accurately at high speed. The semiconductor circuit comprises memory cells for analog and multivalued signals, a read circuit provided with an output to produce voltage indicating a value stored in the memory cell, a comparator provided with an output to produce an end-of-write signal when the voltage at the output of the read circuit becomes equal to a predetermined voltage, a write voltage control circuit having an input for receiving analog and multivalued voltage as write voltage of the memory cell and having an output for producing voltage corresponding to the voltage value, and a write voltage switch circuit for supplying the output voltage from the write voltage control circuit to the memory cell until the end-of-write signal appears at the output of the comparator.

IPC 1-7

G11C 27/00; G11C 11/56

IPC 8 full level

G11C 16/02 (2006.01); G11C 11/56 (2006.01); G11C 27/00 (2006.01); H01L 21/8247 (2006.01); H01L 29/788 (2006.01); H01L 29/792 (2006.01); H10B 69/00 (2023.01)

CPC (source: EP US)

G11C 11/5621 (2013.01 - EP US); G11C 11/5628 (2013.01 - EP US); G11C 11/5642 (2013.01 - EP US); G11C 27/005 (2013.01 - EP US); G11C 2211/5613 (2013.01 - EP US)

Citation (search report)

  • [A] US 4181980 A 19800101 - MCCOY MICHAEL R [US]
  • [A] JP H1055690 A 19980224 - NEC CORP & US 5867427 A 19990202 - SATO TOSHIYA [JP]
  • [XA] YAMASHITA Y ET AL: "WRITE/VERIFY FREE AN ALALOG NON-VOLATILE MEMORY USING A NEURON-MOS COMPARATOR", IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS (ISCAS),US,NEW YORK, IEEE, 12 May 1996 (1996-05-12), pages 229 - 232, XP000704578, ISBN: 0-7803-3074-9
  • See also references of WO 9954882A1

Designated contracting state (EPC)

DE FR GB NL SE

DOCDB simple family (publication)

WO 9954882 A1 19991028; EP 1079394 A1 20010228; EP 1079394 A4 20010711; JP H11306775 A 19991105; US 6456532 B1 20020924

DOCDB simple family (application)

JP 9902061 W 19990419; EP 99913705 A 19990419; JP 12428898 A 19980417; US 67354601 A 20010207